Offshoreonly.com - Oh-no Drive issues

Page 5 of 6

« First

Show 40 post(s) from this thread on one page

Offshoreonly.com (https://www.offshoreonly.com/forums/)

- Baja (https://www.offshoreonly.com/forums/baja-31/)

- - Oh-no Drive issues (https://www.offshoreonly.com/forums/baja/361048-oh-no-drive-issues.html)

Shotgunn

11-24-2019 06:40 PM

Quote:

Originally Posted by tmmii (Post 4716141)

My misunderstand. I thought it was the rear two on one side. 7 & 8 usually run leaner than the rest. A few engine builders are adding a second fuel feed line to
the rear of the fuel rail.

That part of the block should be fine unless it was seeing a ton of blower heat. They will probably deck it though to be sure everything is straight.

No blower(yet), got my hopes that it will be a routine rebuild. The more I research and read about the MPI, it will likely end up on ebay. For sure if it ends up being the cause of this.

Shotgunn

11-24-2019 06:43 PM

Anyone know what make of headers these are? I really like them and would go with them again. They lasted 25 years, so they cant be too bad.

JaayTeee

11-24-2019 08:34 PM

Quote:

Originally Posted by Shotgunn (Post 4716149)

Anyone know what make of headers these are? I really like them and would go with them again. They lasted 25 years, so they cant be too bad.

they look like CMI e tops

Griff

11-25-2019 01:05 AM

Quote:

Originally Posted by JaayTeee (Post 4716165)

they look like CMI e tops

Yep, for sure. CMI Etops with rope seals.

Quote:

Originally Posted by Shotgunn (Post 4716149)

Anyone know what make of headers these are? I really like them and would go with them again. They lasted 25 years, so they cant be too bad.

I have the same headers on my boat, except dry through transom. Pressure testing them is fairly easy. Cap the outlet that goes from the header to tailpipe and then put about 40psi of air into the other water inlet hose. Drop the header into a plastic tub of water and watch for bubbles to find leak. Depending on where the leak is, it could possibly be welded.

Shotgunn

12-01-2019 05:33 PM

https://cimg1.ibsrv.net/gimg/www.off...286ee8adbf.jpg
Tested headers, no leaks found yay! Got engine out- not fun. Back seat was scum adhered in place, must have been 15 ground wires( one on every hidden bolt lol) Put it on my brand new 1000lbs stand, the stand folded in half- top notch china quality there. Looks like something is missing?

Shotgunn

12-01-2019 05:38 PM

https://cimg7.ibsrv.net/gimg/www.off...4af9634474.jpg
https://cimg8.ibsrv.net/gimg/www.off...437c8ac3ac.jpg
https://cimg2.ibsrv.net/gimg/www.off...3f7e973ee2.jpg
https://cimg4.ibsrv.net/gimg/www.off...309c94f849.jpg
https://cimg6.ibsrv.net/gimg/www.off...b01eeb3364.jpg
Roller rockers(crane), Ported heads, and Domed pistons. Not what I was expecting to see

Shotgunn

12-01-2019 05:42 PM

https://cimg3.ibsrv.net/gimg/www.off...60ec3e75f6.jpg

Light scoring
https://cimg4.ibsrv.net/gimg/www.off...32bec7c5e4.jpg

Head gasket
https://cimg5.ibsrv.net/gimg/www.off...16f867f03c.jpg

Head gasket 6 and 8
https://cimg6.ibsrv.net/gimg/www.off...822acf9555.jpg

Head 6 and 8
https://cimg7.ibsrv.net/gimg/www.off...0a487c8be2.jpg

5 and 7
https://cimg9.ibsrv.net/gimg/www.off...1166ffd8f0.jpg

5 and 7

Shotgunn

12-01-2019 05:42 PM

So who said blown head gasket? WINNER

GasketS actually

Shotgunn

12-01-2019 05:48 PM

https://cimg2.ibsrv.net/gimg/www.off...54de1a43e0.jpg

See the ridge? Is this some kind of marine finish? Very pronounced around all cylinders.
https://cimg5.ibsrv.net/gimg/www.off...7b3a0bdb78.jpg

Blown? not bad enough for 0 psi I dont think, and why was #5 reading over 100?
I cant find any other reason other than a blown head gasket, Anyone have thoughts?

Shotgunn

12-01-2019 06:08 PM

JE pistons!

All times are GMT -5. The time now is 03:19 AM.

Page 5 of 6

« First

Show 40 post(s) from this thread on one page